The ALL subquery performs the operation . . . . . . . .

Answer: Option B

This question is about how the ALL subquery works in MySQL.
Think of a subquery as a smaller query inside a bigger one. It gets data, and the main query uses that data.

ALL is a keyword used to compare a value with every row returned by the subquery.

So, ALL works with rows of data.

Therefore, the answer is Option A: row.